(Encyclopedia) vasectomy, male sterilization by surgical excision of the vas deferens, the thin duct that carries sperm cells from the testicles to the prostate and the penis. Vasectomy is a popular…
Pagan festivals, Christian saints, Chaucer's love birds, and the Greeting Card Association of America by Borgna Brunner Roman Roots The history of Valentine's Day is obscure, and…
ListeriaFood-Borne DiseasesIntroductionE. coli 0157:H7CamphylobacterSalmonellaShigellaListeriaTrichinosis Doctors and epidemiologists often overlook Listeria, another food-borne bacterium, as a…
IntroductionPhrasesIntroductionPrepositional Phrases: The Big Daddy of PhrasesAppositives: Something More for Your MoneyVerbal Phrases: Talk Soup Here, we start the construction of your…
Solar panelsTemperature controlHeat regulationIdeal body temperatureFuzzy raptorScientists cannot agree whether dinosaurs were coldblooded or warm-blooded. Cold-blooded animals, such as reptiles,…
The Columbia Encyclopedia is easy to use. All articles are arranged alphabetically with each article heading in boldface type. The headings of biographical articles are inverted and alphabetized by…
Harry Potter, Cast at Last
A young actor gets ready to enroll in Hogwarts by Holly Hartman
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You’ve probably heard of the theory of relativity. And you may even know that motion, mass, energy, time and space are all relative. But if you’re confused about what any of that actually means…
State symbols have been around since 1893, when the World Fair in Chicago featured a National Garland of Flowers with a flower for each of the fifty states. While these flowers didn’t necessarily…
Ancestor of Mammals Discovered The fossil skull of a 260-million-year-old sheep-sized animal was found near Williston on the Northern Cape, South Africa. It is the most primitive member yet…
